Changelog

v3.0a

Depricated secondary instances count.
Added a sendMessage() method to send a message to the primary instance.
Added a receivedMessage() signal, emmited when a message is received from a secondary instance.
The SingleApplication constructor's third parameter is now a bool specifying if the current instance should be allowed to run as a secondary instance of there is already a primary instance.
The SingleApplication constructor accept a fourth parameter specifying if the SingleApplication block should be User-wide or System-wide.
SingleApplication no longer relies on applicationName and organizationName to be set. It instead concatenates all of the following data and computes a SHA256 hash which is uses as the key for the QSharedMemory block and the QLocalServer. Since at least applicationFilePath is always present there is no need to explicitly set any of these prior to initialising SingleApplication. * QCoreApplication::applicationName * QCoreApplication::applicationVersion * QCoreApplication::applicationFilePath * QCoreApplication::organizationName * QCoreApplication::organizationDomain * User name or home directory path if in User mode
The primary instance is no longer notified when a secondary instance had been started by default. An setting for this feature exists.
Added instanceNumber() which represents a unique identifier for each secondary instance started. When called from the primary instance will return 0.

v2.4 --------

Stability improvements
Support for secondary instances.
The library now recovers safely after the primary process has crashed and the shared memory had not been deleted.

The QAPPLICATION_CLASS macro can now be defined in the file including the Single Application header or with a DEFINES+= statement in the project file.

A race condition can no longer occur when starting two processes nearly simultaneously.

Fix issue #3

SingleApplication is now being passed a reference to argc instead of a copy.

Fix issue #1
Improved documentation.